The DTMF (dual-tone multi-frequency)
decoder is plugged into the
sockets for lC2 and lC3 on the 80C32
extension board. The ICs originally fitted
at these positions are moved to the
DTMF decoder board. All functions of
the extension board are retained after
this modification, that is. If the DTMF
decoder is not selected (via software).
Downloading of this magazine article is reserved for registered users only.
Discussion (0 comments)